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Home/ Questions/Q 7863861
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Editorial Team
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Editorial Team
Asked: June 2, 20262026-06-02T23:36:47+00:00 2026-06-02T23:36:47+00:00

Can I Allocate a specitic memory address using pointers in c++ ? For example:

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Can I Allocate a specitic memory address using pointers in c++ ?

For example: Allocate This memory address 25D4C3FA and put 4 in it.

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  1. Editorial Team
    Editorial Team
    2026-06-02T23:36:49+00:00Added an answer on June 2, 2026 at 11:36 pm

    Allocating a specific address in your process’s address space is a bit tricky and platform-specific. On Unix systems, mmap() is probably the closest you’re going to get. The Windows equivalent is VirtualAlloc(). There are, of course, no guarantees since the address might already be in use.

    Writing to a specific address is trivial:

    char *p = (char*)0x25D4C3FA;
    *p = 4;
    

    I assume you have good reasons to want to do that.

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